Aztec C is a fast and efficient C language compiler that produced
compact, fast code. Its featured support for many platforms including
MS-DOS, Apple II DOS 3.3 and ProDOS, Commodore 64, Macintosh,
CP/M-80, CP/M-86, TRS-80, Amiga, and Atari ST. Cross compiler hosts
also included VMS and Unix. It competed against Microsoft C, Apple
MPW C, Lattice C, and many others.